plot_city函数无法画离散图例

[zbowang]

按照这篇文章的做法

plot(x, region='湖北', chinamap=m)

可以正常运行，但

plot(x, region='湖北', chinamap=m, continuous_scale=FALSE)

会报错

Error in cut.default(map2$confirm2, discrete_breaks, include.lowest = T,  : 
  'x'必需为数值

怀疑是因为这一行应修改为

map2$confirm2 <- cut(map2$confirm, discrete_breaks,